Injection needle having varying caliber

Abstract

An injection needle including a guide portion configured to have a first outer diameter, and a delivery portion, configured with a tip to penetrate tissue and deliver a medication, and to have a second outer diameter smaller than the first outer diameter, extending from a distal end of the guide portion, wherein the guide portion is configured to have a bend proximate the distal end such that the delivery portion extends at a predetermined angle from a line of the guide portion opposite the bend.

1 . An injection needle, comprising:
 a guide portion configured to have a first outer diameter; and   a delivery portion, configured with a tip to penetrate tissue and deliver a medication, and to have a second outer diameter smaller than the first outer diameter, extending from a distal end of the guide portion;   wherein the guide portion is configured to have a bend proximate the distal end such that the delivery portion extends at a predetermined angle from a line of the guide portion opposite the bend.   
     
     
         2 . The injection needle of  claim 1 , wherein the guide portion is configured to have the first outer diameter at both sides extending from the bend. 
     
     
         3 . The injection needle of  claim 1 , further comprising a hub provided at a proximal end of the guide portion, the hub being configured to mate with a corresponding hub to connect the injection needle to a medication delivery device. 
     
     
         4 . The injection needle of  claim 1 , wherein the guide portion and the delivery portion are formed from a common body. 
     
     
         5 . The injection needle of  claim 4 , wherein the delivery portion is configured to be tapered from the distal end of the guide portion to a predetermined point on the delivery portion. 
     
     
         6 . The injection needle of  claim 5 , further comprising a ridged portion having a third outer diameter larger than the first outer diameter, and provided at the distal end of the guide portion, to serve as a safety stop for the delivery portion. 
     
     
         7 . The injection needle of  claim 6 , wherein the ridged portion is a separate body adhered to the injection needle. 
     
     
         8 . The injection needle of  claim 7 , wherein the ridged portion is formed of a separate material than the injection needle. 
     
     
         9 . The injection needle of  claim 4 , further comprising a ridged portion proximate the distal end of the guide portion, the ridged portion having a third outer diameter larger than the first outer diameter, such that the ridged portion serves as a safety stop for the delivery portion. 
     
     
         10 . The injection needle of  claim 4 , wherein the guide portion is more rigid than the delivery portion. 
     
     
         11 . The injection needle of  claim 1 , wherein the guide portion and the delivery portion are separately formed. 
     
     
         12 . The injection needle of  claim 11 , wherein the delivery portion extends through the entirety of the guide portion, the guide portion being configured as a sleeve surrounding the delivery portion. 
     
     
         13 . The injection needle of  claim 11 , further comprising a ridged portion having a third outer diameter larger than the first outer diameter, and provided proximate the distal end of the guide portion, to serve as a safety stop for the delivery portion. 
     
     
         14 . The injection needle of  claim 11 , wherein the guide portion is more rigid than the delivery portion. 
     
     
         15 . The injection needle of  claim 11 , wherein both the guide portion and the delivery portion are fixed to a hub at a proximal end of the guide portion. 
     
     
         16 . The injection needle of  claim 11 , wherein the delivery portion is adhered to the guide portion. 
     
     
         17 . An injection needle, comprising:
 a first needle portion having a first outer diameter; and   a second needle portion having a second outer diameter, the second outer diameter being smaller than the first outer diameter,   wherein the second needle portion has a tip configured to penetrate a soft tissue.   
     
     
         18 . The injection needle of  claim 17 , further comprising a hub mounted to the first needle portion, the hub being configured to mate with other similar hubs. 
     
     
         19 . The injection needle of  claim 17 , wherein the second needle portion forms an angle with the first needle portion. 
     
     
         20 . The injection needle of  claim 19 , wherein the angle is approximately 37 degrees. 
     
     
         21 . The injection needle of  claim 19 , wherein the angle is approximately 90 degrees. 
     
     
         22 . The injection needle of  claim 17 , further comprising a safety stop positioned at an opposite end of the second needle portion from the tip, the safety stop having a larger outer diameter than both the first needle portion and the second needle portion. 
     
     
         23 . An injection needle, comprising:
 a hub portion configured to mate with a corresponding hub portion of a medication delivery device;   a needle attached at a proximal end to the hub and configured to have a first outer diameter extending in a longitudinal direction from the hub, the first outer diameter having a bend portion proximate a distal end of the needle, the bend portion having a predetermined angle matching a corresponding tissue path through which the needle will pass to enter a targeted region of the patient, the needle including a distal end configured to have a second outer diameter smaller than the first outer diameter, the second diameter terminating to a needle tip for delivery of medication into the targeted region, the first diameter being specifically sized to push away bodily tissue in the tissue path a distance sufficient to provide an opening for the second diameter to enter the targeted region at the predetermined angle to deliver medication to the targeted region.   
     
     
         24 . The injection needle of  claim 23 , further including a ridged portion formed proximate a point at which the tapering portion begins from the first outer diameter, the ridged portion having a third outer diameter larger than the first outer diameter specifically sized to abut bodily tissue at an end of the tissue path to inhibit the needle tip from penetrating beyond the targeted region.